ShmoopTube

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Thank you We sneak and here's your shmoop du jour

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brought to you by lab partners Nothing's better than a

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good lab partner and nothing's worse than a lab partner

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who just sits there not participating just looking at his

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phone and making us do all the work while he

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plays candy crush Yeah that that were bitter ryan from

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mrs anders glass Well during a classroom optics experiment bart

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stares through a thin converging lens with a focal length

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of two inches located ten inches away Vicky bart's lab

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partner and friend wants to project a silly image onto

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his forehead Where should vickie place the object and hear

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the potential answers All right Okay well this is how

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physics students cut it loose Bye Goofing around with optics

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Yeah sure It might not be the most hilarious prank

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in the world but you're worse at least nothing's exploding

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like those chemistry All right well what we need to

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be able to solve this is the thin lens equation

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The thin lens question means that the reciprocal of the

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focal length equals the reciprocal of the object Distance plus

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the reciprocal of the image Distance We have the image

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distance ten inches and the focal length Two inches We

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just need to plug those numbers in and solve for

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the object Distance Right Well crunching the numbers shows us

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that the object needs to be placed two point five

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inches from the lens Now since this is a converging

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lens and not a mirror the object needs to be

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on the opposite side of the lens from bart for

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the image to be projected on bart's Cranium don't When

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object and image distances are on opposite sides of a

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lens the distances are positive So since we know the

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object distance and on which side of lens the object

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needs to be we know That the correct answer has

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to be deep And remember there are worse things your

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lab partner can do than project a goofy and john

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your forehead After all that fire extinguisher is there for 00:01:55.825 --> [endTime] a reason Teo

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